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airbnb has recently toughened the requirements for being a superhost from 8 five star reviews out of 10 to an average of 4.8* and many current superhosts will now lose their badge. Also a minimum average review rating of 4.7* has been introduced to stay online and some host will not make it.
Now they are discontinueing the cohost payment program. Hosts that are not able to handle their check-ins personally will have problems to find someone to help and may have to stop hosting.
The most recent figure I have seen says, that airbnb now has 4,5 million listings. HomeAway and booking com each have 1,6 million listings, together 3,2 millions. So airbnb has more listings than their 2 biggest competitors combined.
There is no question in my mind, that airbnb wants to reduce the number of listings and I see more actions to achieve this on the horizon.